<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
</head>
<body>
	<input type="button" id="butid" name="butname" value="同意" disabled="disabled"/>

</body>
<script type="text/javascript">

	var time ;
	
	$(function() {
		time = setInterval("showbut()",5000);
	})
	
	function showbut(){
		//显示
		$("#butid").removeAttr("disabled");
		// 清空定时：
		clearInterval(time);
	} 


</script>
</html>







